app: harden mirroring lifecycle and state

1 files changed, 12 insertions, 0 deletions

diff --git a/app/src/test/java/invalid/lena/scrcpy/AtomicFilesTest.java b/app/src/test/java/invalid/lena/scrcpy/AtomicFilesTest.java
index 7124fd2..1cafb0c 100644
--- a/app/src/test/java/invalid/lena/scrcpy/AtomicFilesTest.java
+++ b/app/src/test/java/invalid/lena/scrcpy/AtomicFilesTest.java
@@ -51,4 +51,16 @@ public class AtomicFilesTest {
         assertArrayEquals("good2".getBytes(), Files.readAllBytes(f.toPath()));
         assertFalse(new File(dir.getRoot(), "x.tmp").exists());
     }
+
+    @Test
+    public void writeRemovesEveryStaleTemp() throws Exception {
+        File f = new File(dir.getRoot(), "x");
+        Files.write(new File(dir.getRoot(), "x.tmp-old").toPath(), new byte[]{1});
+        Files.write(new File(dir.getRoot(), "x.tmp-new").toPath(), new byte[]{2});
+
+        AtomicFiles.write(f, "good".getBytes());
+
+        assertFalse(new File(dir.getRoot(), "x.tmp-old").exists());
+        assertFalse(new File(dir.getRoot(), "x.tmp-new").exists());
+    }
 }